Nanopower Series Magnetoresistive Sensor ICs

Honeywell
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Honeywell’s new Magnetoresistive Sensor ICs, Nanopower Series, are designed to accommodate a wide range of applications with large air gaps, small magnetic fields and lower power requirements. They respond to either a North or South pole applied in a direction parallel to the sensor and do not require a pull-up resistor.

Honeywell’s Nanopower Series Magnetoresistive (MR) Sensor ICs are ultra-sensitive devices designed to accommodate a wide range of applications with large air gaps, small magnetic fields and low power requirements. The sensor ICs respond to either a North or South pole applied in a direction parallel to the sensor. They do not require the magnet polarity to be identified, simplifying installation and potentially reducing system cost. These sensor ICs use a very low average current consumption and a push-pull output which does not require a pull-up resistor. The sensor ICs can operate from a supply voltage as low as 1.65V, promoting energy efficiency. The Nanopower Series is available in two magnetic sensitivities to accommodate a variety of application needs:

  • SM351LT: For applications requiring ultra high magnetic sensitivity (7G typical operate, 11G maximum operate) and a very low current draw (360nA typical)
  • SM353LT: For applications requiring very high magnetic sensitivity (14G typical operate, 20G maximum operate) and a very low current draw (310nA typical).

 

Features

  • Two magnetic sensitivities: Ultra-high sensitivity: 7Gauss typ., 11Gauss max. (SM351LT); Very high sensitivity: 14G typ., 20Gauss max. (SM353LT)
  • Nanopower: Average current of 360nA typ. (SM351LT) and 310nA typ. (SM353LT)
  • Supply voltage range: 1.65Vdc to 5.5Vdc; simplifies design-inOmnipolar sensing: Responds to either a north or south pole and eliminates the need for the magnet polarity to be identified
  • Temperature range: -40°C to 85°C
  • Push-pull output: Does not require external pull-up resistor
  • Non-chopper stabilized design: Eliminates electrical noise generated by the sensor
  • RoHS-compliant materials: Meets Directive 2002/95/EC
  • Package: Subminiature SOT-23

Applications

  • Industrial
  • Water, electric and gas meters
  • Security systems
  • Industrial smoke detectors
  • In cylinder/piston detection
  • Medical
  • Exercise equipment
  • Infusion pumps
  • Hospital beds
  • White Goods
  • Refrigerators
  • Microwaves
  • Dishwashers
  • Medium-Sized Consumer Electronics
  • Battery operated tools